package com.itheima.riggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.riggie.common.R;
import com.itheima.riggie.domain.Category;
import com.itheima.riggie.domain.Dish;
import com.itheima.riggie.domain.DishFlavor;
import com.itheima.riggie.dto.DishDto;
import com.itheima.riggie.service.CategoryService;
import com.itheima.riggie.service.DishFlavorService;
import com.itheima.riggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }


    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name!=null,Dish::getName,name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(pageInfo,queryWrapper);
        //创建新的分页对象
        Page<DishDto> dtoPage = new Page<>();
        //进行对象拷贝
        BeanUtils.copyProperties(pageInfo,dtoPage,"records");
        //获取基本分页查询到集合数据
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> dtoList = new ArrayList<>();
        //遍历菜品集合
        records.forEach(dish -> {
            // 将dish拷贝到dishdto
            DishDto dto = new DishDto();
            BeanUtils.copyProperties(dish,dto);
            //5.2 查询每一个菜品所属分类名称
            Category c = categoryService.getById(dish.getCategoryId());
            dto.setCategoryName(c.getName());
            //放入集合
            dtoList.add(dto);
        });
        // 将dtolist集合,添加到dtopage分页对象中
        dtoPage.setRecords(dtoList);

        return R.success(dtoPage);
    }
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("修改菜品成功");
    }
/*
    @GetMapping("list")
    public R<List<Dish>> list(Dish dish){
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件,查询状态为1(起售) 的菜品   只查,询起售菜品,符合正常逻辑
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }
*/  @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
    List<DishDto> dishDtoList = null;
//动态构造key
    String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844391040167938_1
//先从redis中获取缓存数据
    dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
    if(dishDtoList != null){
        //如果存在，直接返回，无需查询数据库
        return R.success(dishDtoList);
    }
    //构造条件查询
    LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
    //通过当前菜品对应的分类  获取当前分类下的所有菜品
    queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
    // 添加条件, 只获取状态起售状态的菜品
    queryWrapper.eq(Dish::getStatus,1);
    //排序条件
    queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
    //获取 符合条件集合
    List<Dish> list = dishService.list(queryWrapper);

    dishDtoList=list.stream().map((item)->{
        DishDto dishDto=new DishDto();
        //对象拷贝, 增加扩展性
        BeanUtils.copyProperties(item,dishDto);
        //获取当前分类 id
        Long categoryId = item.getCategoryId();
        //根据id查询 分类对象
        Category category = categoryService.getById(categoryId);
        // 获取分类对象  分类名
        if (category!=null){
            String name = category.getName();
            //设置 分类名
            dishDto.setCategoryName(name);
        }
        //当前菜品id
        Long dishid = item.getId();
        //口味构造对象
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        // 从口味表获取当前菜品的口味信息
        lambdaQueryWrapper.eq(DishFlavor::getDishId,dishid);

        List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
        dishDto.setFlavors(dishFlavorList);
        return dishDto;
    }).collect(Collectors.toList());
    //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
    redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
    return R.success(dishDtoList);
}




    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        log.info("删除数据 {}",ids);
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper();
        queryWrapper.in(ids!=null,Dish::getId,ids);
        queryWrapper.eq(Dish::getStatus,1);
        int count = dishService.count(queryWrapper);
        if (count>0){
            return R.error("商品在起售状态禁止删除");
        }
        dishService.removeByIds(ids);
        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key
        return R.success("菜品删除成功");
    }

    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable int status,@RequestParam List<Long> ids){
        log.info("状态为 {} 要删除的id为{}",status,ids);
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper();
        queryWrapper.in(Dish::getId,ids);
        List<Dish> list = dishService.list(queryWrapper);
        for (Dish dish : list) {
            dish.setStatus(status);
            dishService.updateById(dish);
        }

        return R.success("修改状态成功");


    }














}
